The only semi unexpected thing is the brakes. This damn 06 WRX eats brake pads in the front. Since new, the inners wear out a lot faster than the outers. I currently have 3/8" on the outer pads and 3/16"-1/8" (they taper) on the inners. On top of it this will be the 4th set in 78,000 miles. I've never had a car soo brake pad hungry, and I'm nicer to this one then my old cars.